Boom



H. COHE'N June 5, 1945.

Filed new 1, 1943 2 sheets-sheet 2 5 r m m m. mu Q. 5 mu.

Patented June 5, 1945 f omen. srA Es PATENT ori ice s 'BooM Halold cohen, Elizabeth, N.

1' shrams December 1, 1943, Serial No. 512,449 I 1 f Claims. (01212-1441, 1

- other. The (rocker also includes two short rods This invention relates tofa devicefor carrying;

out hoisting operations, and-which may be'used advantageously for hoisting and emplacing com ponents of a structure in the courseiof its erection. The device isuseful, for instance,-in.erect ing towers, structural metal framework and other analogous structures by hoisting the materials where wanted. s

The principal object of the invention is the provision of a device of the indicated character which is designed and adapted --to facilitate the work of hoisting materials for the stated purposes. A further object Of the invention is the provision of a boom which is adjustable to pick up" and deposit difierent size loads-from different 10- cations; a boom whichimay be readily -moved from one place to, another and anchored in the hoisting operations; and a boom whichis of eflicient and substantial design and easy to operate.

The nature of the invention and its distinguishing features and advantages will-appear when the following specification'is read in conjunction with the accompanying drawings, in which- Figs. 1 and 2 are side elevations showing the device of the present invention in use, in the erection of a tower by hoisting the sections of the tower in place.

Fig. 3 is a top plan view.

Fig. 4 is an enlarged side view of the device,

and a portion of a tower section on which the.

device is mounted. I

Fig. 5 is a. sectional view taken on the line 5-5 of Fig. 4. I

Fig. 6 is a detail sectional view of one of the anchors, the section-being taken on the line 66 of Fig. 7. I

Fig. 7 is a view of one side of the anchor shown in Fig. 6. v

Fig. 8'is a viewof the other side of the anchor shown inFig. 6.

Fig. 9 is a sectional view taken on the line 9-9 of Fig. 4.

Referring now more particularly-to Figs. 4 to 9' inclusive of the drawings, it will be apparent the device of the present invention, generally'stated, comprises a rocker Ill, a boom or'gib II on the rocker, means If! on which the rocker I D is mounted, which detachably secures the device in place for use, and means l3 for operating the rocker to move theboom or'gib when hoisting or lowering a load.

The rocker l0 consistsof a triangular frame structure of welded parts. The rocker includes two short tubes l4 and I5 respectively, arranged in axial alinement and in spaced relation to each adjustable section.

l6 in axial alinement andin spaced relation 'to each other, which serve as the pivot or fulcrum fortherocker. W

The boom or gib H consists-of two sections l1 and 18' respectively, the same being in the form of tubing, and" the sections being telescopically related, the section II being slidable inwardly and outwardly of the section |8. The outer end of the section I! is curved downwardly as at 19. The section l8 extends through the tube l5 and is fixedly secured thereto by suitable fasteners 20.. The section I8 is therefore the fixed section on the rocker i0, whereas thesection I1 is the The section I! extends loosely through the tube [4 which helps the section l8 to'support the section l1. Since-the section I1 is adjustably-engaged with the section I8, it is Each attachment l2 includes a plate 22. Straps 23 are secured to the plate 22 on one side thereof by screw bolts 24. These straps 23 securely clamp bearings 25 respectively. Each bearing is in the nature of a socket, and there being two such" bearing sockets for each rod l6. In this manner the rocker I0 is connected with the related attachment 12 for rocking movement. The plate 22 on the other side has hingedly connected therewith a double right angle clip 26 by a hinge 21 and an angle iron 28, the leaves of the hinge being welded'to the clip 26 and angle iron 28 respectively. Two of the bolts 24 secure the angle iron 28 to the plate 22 and the remaining lower bolts 24 detachably secure the clip 26 to the plate 22. The plate 22, clip 26 and angle iron 28 in operative relation may be attached to a structural element or component, such as a channel 29 constituting a part of a tower in the course of erecting it, as will be seen from Figs. 1 and 2. It will be understood the attachments l2 serve for anchoring the device in its entirety, so that the rocker I0 may be rocked on the pivots I6 and causing the boom H to move with the rocker.

The device may be readily detached and'shifted to a new position in which it is anchored for use.

The means [3 consists of pulleys 30, there being one on the outer end of the section 11, one

on the tube [4 and one on the butt end of the section l8. Each of pulleys 30 is supported by 36 which are set in place one after the other and secured to each other according to known meth ods. The boom H is adjusted to the required" length in order that each unit in turn may be grappled and then be. hoisted and swung into place. As shown in Fig. l, the boom II is normally tilted toward the load and the means 35 is secured to a unit 36. By operating the winch 34, the cable 32 is'wound: on the drum 33, causing the upward movement'of the: unit 36 while the boom remains stationary. When the grapple 35 engages the end of thesection H, the pulling force on the cable causes the rocker ID to rock, 7

thereby bodily moving the boom with it, and so swinging the unit 36' intoregistrywith theuppermost unit on which the device is mounted, as shown in. Fig. 2. The added unit then may be secured in place after which the device is de-. tached' and movedup and anchored to the added unit for a repetition of the operations. hereinabove described, as will be understood.

It is at. once obvious the device has many otheruses. where it is desired to facilitate hoisting or transferring of material for different purposes. It is to be understood that detailsin the construction of the device may be. modifiedand rearranged without departing, from the invention as expressed in theappended claims.

Iclaim: l. A raising and lowering device COIIlDliSiDg' a rocker, a boom composed of sections, the first of said sections being fixedv on saidrocker and the second section being adjustably engaged with the first section to vary the length of the boom, and pulleys on said sections respectively to accommodate a cable which serves for raising and lowering a load and also operating the rocker.

2. A device comprising a rocker, a boomadjustable a to length mounted on said rocker to move therewith, pulleys on the boom and rocker respectively, a cable trained over said pulleys, said rocker consisting; of aframe: structure having axially alined supports for supporting the boom, attachments for detachably connecting the device'for use, and means supported by the attachments on which the rocker rocks.

3. A raising and lowering device comprising a rocker and aboom, said rocker consisting of a frame having two short tubes arranged in axial alinement and in spaced relation to each other, and means serving as a pivot or fulcrum for the rocker, said boom consisting of two sections telescopically related so that the first section is slidable inwardly and outwardlyof the second section, means to hold the first section in the adjusted position with respect to" the first section, the second section ex nding through one of said short tubes and secured thereto, the first section extending through the other of said tubes and slidable therein.

4*. A raising and lowering device as set forth in claim 3, and pulleys on the sections of the boom and the short tube which supports the slidable section of the boom respectively.

5. A device comprising a frame structure having pivots and constituting a rocker, a boom mounted on said rocker to move therewith, attachments for detachably connecting the device for use, and bearingmeans connected with said attachments for said pi vots to mount the rocker for rocking movement, each of said attachments including a-hinged clipadapted to engage a suitable support for the device, and means to secure the clip inengagement with the support.

HAROLD COHEN with 

